30It should, moreover, be emphasised that the provisions of Title II of Regulation No 1408/71, which includes Article 14 of that regulation, constitute, according to settled case-law, a complete and uniform system of conflict rules, the aim of which is to ensure that workers moving within the European Union are subject to the social security scheme of only one Member State, in order to prevent more than one national legislative system from being applicable and to avoid the complications which may result from that situation (see, to that effect, judgments of 16 February 1995, Calle Grenzshop Andresen, C‑425/93, EU:C:1995:37, paragraph 9; of 13 September 2017, X, C‑570/15, EU:C:2017:674, paragraph 14; and of 8 May 2019, Inspecteur van de Belastingdienst, C‑631/17, EU:C:2019:381, paragraph 33).
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